<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>closure</title>
  </head>
  <body>
    <script>
      // getSalary(12000,2000)
      // getSalary(15000,3000)
      // getSalary(15000,4000)
      function getSalary(base) {
        return function (performance) {
          return base + performance
        }
      }
      let salaryLevel1 = getSalary(12000)
      let salaryLevel2 = getSalary(15000)

      console.log(salaryLevel1(2000))
      console.log(salaryLevel2(3000))
    </script>
  </body>
</html>
